Rendering artifacts along world border

[snnacks]

I have been having an issue with ChunkyMap artifacting along the world borders of my maps for some reason.

Both worlds I tested on are 1.19.4, but one of the worlds I was able to test on 1.16.5 and a similar form of artifacting happened. I also tried different dynmap versions, but that also wasn't working.

When opening the world file in Chunky it has no problem rendering the world border.

One of my worlds prints this error when rendering along the border:
[ChunkyMap] Missing header in region file!

My setup:
Minecraft 1.19.4
Paper #550
Dynmap-3.5
ChunkyMap-2.6.0-pre4

[AF91Nx]

I have the same issue too.

server setup :
Paper 1.20.4-451
Dynmap 3.7 Beta 4
ChunkyMap (Chunky 2.4.6)